I have a GTX670 overclocked and an intel 3570k stock. Running windows 8. I use EVGA to overclock the GPU and I have GeForce Experience but I do not think that I have used it to optimize DayZ.
If it makes any difference I have two DayZ folders located in my documents (dayz and dayz other profiles) the actual physical location of my documents in on my file server.
That is everything I can think of